Why Type C and IVC must be separated
One-inch Type C became a widely used professional open-reel format for broadcast and post-production. IVC manufactured several earlier one-inch helical-scan systems, and “IVC” on a reel can refer to a machine family rather than Type C. The reel, hub, leader, label, recording date and originating facility are all useful evidence.
| Format | What to look for | Important distinction |
|---|---|---|
| 1-inch Type C | Type C, SMPTE C, BVH or VPR-related notes | Later standardised professional format; not interchangeable with every earlier one-inch system. |
| IVC helical scan | IVC machine or format references, older dates, colour/mono notes | Several possible systems; exact compatibility must be confirmed. |
| Unknown 1-inch reel | Tape width known but label incomplete | A test and documentation review may be needed before a firm workflow is set. |
PAL, NTSC, colour and black-and-white
Type C and IVC material may be PAL or NTSC, and older IVC recordings may be black-and-white or colour depending on the system and period. Compatible playback is assessed from labels, provenance and test results. A reel recorded in an industrial, university or overseas facility may not follow the standard expected from its present location.
The output can preserve the original frame rate and image character. Standards conversion, reframing or deinterlacing is a separate decision and should not be applied blindly to an archive master.
Open-reel inspection and machine preparation
Open-reel videotape exposes more of the pack and edges than a cassette. Before loading, the reel and tape are checked for pack quality, flange damage, contamination, splices, leader condition and signs of binder problems. Machine setup can include cleaning, threading, reference checks and alignment appropriate to the recording.
- Reel diameter, hub and tape width confirmed.
- Labels and cue sheets photographed or logged when required.
- Tape condition assessed before full threading and playback.
- Controlled conditioning considered only for suitable tape stocks and symptoms.
- Machine and signal path prepared for the identified format and standard.
- Capture monitored closely for clogging, tension problems and alignment changes.
Preservation and access deliverables
A high-quality preservation master is normally recommended for one-inch video because the source is specialist, replay opportunities may be limited and later restoration is easier from a robust capture. A smaller MP4 access copy can be delivered alongside it. ProRes, DNxHD and agreed custom files are available according to the project.
Pricing and unknown reels
The published guide for 1-inch Type C is from £59.99. The published price for 1-inch IVC helical-scan is £59.99 per tape. These are guide figures for compatible material; condition, running time, format uncertainty, treatment, machine setup, repeated alignment work and custom deliverables can require a project quotation.
For an unknown reel, send photographs of both flanges, the hub, leader, box and all labels. Include the tape width, reel diameter, approximate recording year and the organisation that made it.
Packing and inventory advice
- Secure the reel in its box so it cannot move against the flanges.
- Do not tighten or repack the tape by hand.
- Keep detached labels and cue sheets with the correct reel.
- Number boxes externally without writing on the tape pack.
- Separate reels with visible mould or loose debris.
- For collections, provide a one-line inventory entry per reel.
Questions customers commonly ask
Is every one-inch videotape Type C?
No. One inch describes the tape width. Type C, Type B and several IVC systems are different recording formats.
Can you handle black-and-white IVC recordings?
Compatible monochrome and colour IVC helical-scan material can be assessed. The exact system must be confirmed from the reel information and playback response.
Should an old one-inch reel be baked before delivery?
No home treatment should be attempted. Conditioning is format- and tape-stock-specific and is considered only after assessment.
What files should I request?
For specialist open-reel material, a preservation master plus an MP4 access copy is usually the most useful combination. Production requirements can be matched separately.